Re: [Geekos-devel] defs.h

[Sergey L. <ioa...@ya...>]

Sounds right.
i did try that, everything seems working.

--- Behrang Saeedzadeh <beh...@ya...> wrote:
> I know that there are two PICs installed on ATs and
> beyond... what I want to say is that the binary
> representation of EOI is 0x20 so the End_IRQ should be
> something like this:
> 
> void End_IRQ( struct Interrupt_State* state )
> {
>     int irq = state->intNum - FIRST_EXTERNAL_INT;
>     short int EOI = 0x20;
> 
>     if ( irq < 8 ) {
> 	// Specific EOI to master PIC
> 	Out_Byte( 0x20, EOI );
>     }
>     else {
> 	// Specific EOI to slave PIC, then to master (cascade
> line)
> 	Out_Byte( 0xA0, EOI );
> 	Out_Byte( 0x20, EOI );
>     }
> }

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